BIO120H1 Lecture Notes - Lecture 12: Phenology, Conservation Biology, Global Warming
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BIO120H1 Full Course Notes
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See slide p9 - trends in a warning to humanity. Evidence for directional selection for early flowering in both pops. Collected seeds from wet years and then from dry year to see how the plant evolved. E. g. tree cannot adapt like this because life span is so long could not adapt every year to new climate, the rapidity of climate change. Biodiversity - the variety of life on earth. The number and kinds of living organisms in a given area. Interspecific variation or species diversity (studied by ecologists) Extinction is forever, we don"t know how extinction of one organism affects ecosystem. Extinction is natural but its current rate is not. Anthropogenic extinction - caused by humans - estimated at 4-6000 species per year. Climate change not yet major cause of extinction, yet. Study of species, ecosystems and ecological communities that are negatively affected by human activities. Provides biological concepts and tool for preserving biodiversity and ecosystem function function.
